There are benefits to them being enchantments. They are permanents, so can bounce it back to hand and replay. They can also be flickered and there are creatures that can relock/reunlock the rooms. Being an enchantment instead of something new allows you to interact with them with spells like disenchant and you can splash them into enchantment decks instead of them being stuck to one Room deck forever.
![[DSK] Underwater Tunnel // Slimy Aquarium](https://lemmy.world/pictrs/image/85a2c818-5375-47c9-b2e0-676666a2ccc0.jpeg){kind=link}
There are benefits to them being enchantments. They are permanents, so can bounce it back to hand and replay. They can also be flickered and there are creatures that can relock/reunlock the rooms. Being an enchantment instead of something new allows you to interact with them with spells like disenchant and you can splash them into enchantment decks instead of them being stuck to one Room deck forever.